Thermal cell



FIG. 1 is a perspective view of a thermal cell showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is another perspective view thereof, shown in environmental use.

The broken lines showing a second thermal cell and screws represents unclaimed subject matter and forms no part of the claimed design. 

The ornamental design for a thermal cell, as shown and described. 